(Reaffirmed 2003) Indian Standard ( First Revision) Physical Methods of Test Sectional Chairman DE T. RADHAKBEBENAEI Vice-Chairmqn DB V. SUXDABAM Indian Jute Cnloutt8 IS : 2387 - 1969 METHODS FOR DETERMINATION WEIGHT OF JUTE FABRICS OF Committee, Representing TDC 1 Association, Industries' Research Cotton Research Technological ( Indian Council of Agricultural Bombay Laboratory Research ), . Bombay Textile Research Association, Bombay Government of Yysore SEBIT.S. CHANDBASIEIUSABIAH Office of the Jute Commissioher, Calcutta SHBI K. K. CHA!J!TEBJEE The Silk and Art Silk Mills' Research AssocisSHEI M. B. CEEvlI tion, Bombay Indian Jute Mills Association, Calcutta DR D. B. DAS Office of the Textile Commissioner, Bombay SBRI I. B. DUTT Smu R. C. I&AT= ( Alternare ) Research Ahmedabad Textile Jndustry's DE B. V. IYEB Association, Ahmedabad SBRI B. R. SUELAT ( Alrernare ) Government of West Bengal DB S. M. MIJKAEXJEE National Test House, Calcutta 8ERI S. P. MULLICK Unistry of Defence ( DC1 ) SBRI B. D. NAITHANX SH~I G. N. CHATTERJI ( Alternate ) SARI SUUBXUIBHAI RAXANLAL The Federation of Gujarat Mills and Industries, PABIKH Baroda Directorate General of Supplies & Disposals SHJII 1. L. PATEL ( Inspection Wing ), New Delhi SHEI A. K. PBAXANICX ( Alternote ) SHBI K. P. RAYAKBISENA The South India Textile Research Association Coimbatore PILLAY SHBI R. 8. PBAYAQ Textiles Committee, Bombay SHIU R. C. N. Baowrrx ( Alter/tare ) DE B. L. BAXJUUIC~( A&em&e to Dr T. Redhskrishnan ) DE V. 0. MUNSHI ( AffermUe to Dr V. Sundaram 1 The SEEI T:V. ANANTHU Members ( Continued on page 2 ) INDIAN MANAK STANDARDS BHAVAN, 9 BAHADUR . NBW DELHI INSTITUTION SHAH 110002 ZAFAR MARC IS : 2387 - 1969 ( Continued from page 1 ) Members SIIRI K. N. RAMACHANDBAN Representing Department of Agriculture, Ministry of Foods Agriculture, Community Development and Co-operation The`Millomners' Association, Bombay The National Rayon Corporation Ltd. Bombay SHRI H. SAEASRANAMAN DR S. I. TABAPOREWALA SHRI D. S. NAD~AENI ( Alternate ) Wool Research Association, Bombay Srrnr A. S. WASH SHEI Y. G. DESEPANDE ( Alternate ) Government of Meharashtrs SHRI P. R. YERI Director General, IS1 ( Ex-officio Member SHBI S.M. CKAKBARORTY, Director ( Tex ) ) Secretary SRRI D. R. KOHLI Assistant Director ( Tex ), IS1 Subcommittee for Physical Methods of Test for Jute, TDC 1:3 Corwener DR D. B. DAS Indian Jute Mills Association, Calcutta Indian Jute Industries' Research Association, C8lCUtt8 Ministry of Defence ( DGI ) Technological Research Laboratories ( Indian Council of Agricultural Research ), Calcutta Members SHRI S. K. CHATTE~JEE SHRI G. N. CHATTERJI SHRI R. N. MATHUR ( Alternate ) Jute DIRECTOR SHRI N. GEO PAUL ( Alternate ) Indian Jute Mills Association, Calcutta Sam A. K. GHOSE Office of the Jute Commissioner, Cslcutta &RI S. GUHA National Test House, Calcutta &SRI S.P. &fULLICK SHBI A. GHOSH ( Alternate ) SHRI s. s. PAUL Institute of Jute Technology, Calcutts SHRI N. N. PAUL ( Alternate ) 2 IS : 2387 - I969 Indian Standard METHODS FOR DETERMINATION WEIGHT OF' JUTE FABRICS OF ( First Revision) 0. FOREWORD 0.1 This Indian Standard ( First Revision) was adopted by the Indian Standards Institution on 7 July 1969, after the draft finalized by the Physical Methods of Test Sectional Cbmmittee had been approved by the Textile Division Council. 0.2 This standard which was first published in 1963 has been revised with a view to eliminating unnecessary and undesirable variations in the testing procedure for the determination of weight per unit length and It is intended to prescribe weight per unit area of jute fabrics. generally applicable methods of giving results of an accuracy considered adequate for the purpose of a standard specification. 0.3 All quantities and dimensions in this standard have been expressed in the metric system. However, for the information of the overseas consumers using fps system conversion factors have been given in the form of notes at suitable places in the standard. 0.4 In reporting the result of a test made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS : 2-1960*. 1. SCOPE 1.1 This standard prescribes methods for determination linear metre and weight per square metre of jute fabrics. 2. TERMINOLOGY 2.0 For the purpose of this standard, the fqllowing definitions shall apply. regain on the basis of which the of weight per 2.1 Contract Regain - The percentage corrected net weight is calculated. `Rules for rounding off numerical values ( revised). 3 x5:2387-1969 2.2 Lot - All the bales, bundles or rolls ofjute fabrics purporting to be of one definite type and quality containing one definite number of cuts delivered to one buyer against one despatch note. 2.3 Moisture Regain - The weight of moisture present in. a textile material ( here jute fabric ) expressed as a percent of its oven-dry weight. 2.4 Oven-Dry Weight - The constant weight of textile material ( here jute fabric ) obtained by drying it at a temperature of 105" to 110°C. 3. ATMOSPHERIC CONDITIONS FOR TESTING * atmospheric condi- 3.1 The test may be carried out in the prevailing tions of the test room. 4. APPARATUS 4.1 For the purpose of this standard, the following used: a) Horizontal, smooth and flat table; b) Graduated steel scale; apparatus shall be c) T-square; d) Balance capable of weighing to an accuracy of O-05 g; e) Conditioning oven suitable for drying samples to constant weight at 105" to 110°C; f) A suitable moisture meter; and g) Balance capable of weighing to an accuracy 5. METHOD SAMPLE A BASED ON OVEN-DRY FULL WIDTH of 100 g. OF CUT WEIGHING 5.1 Procedure - BASED ON OF SAMPLE. 5.1.1 Lay one end of cloth from a cut or roll smoothly on a flat table. By using a steel scale and a T-square make a swatch 500 f 2 mm in length perpendicular to selvedges across the full width of the fabric and cut out the swatch so marked. This shall constitute a test specimen. 5.1.1.1 Prepare at least five such test specimens from a sample lot. 5.1.1.2 For determination of weight per square the width of the specimen according to IS : 19%1961*. *N&hod for determination of dimensions Of fabrics. metre, measure 4 IS :2387 - 1969 5.1.2 Dry the test specimen to constant weight in an oven maintained at 105" to 110°C and weigh it to an accuracy of 0.2 percent ofits weight without removing the specimen from the oven, the draught ( see Note 1) being stopped during weighing. Calculate the weight per linear metre or weight per square metre of the specimen at the applicable contract regain value ( see Note 2 ) by using the following formulae: weight per linear metre, in g = Wd(loo+R) 50 2Wd(lOO+R) W weight per square metre, in g = where " Wd = oven-dry R W weight of the specimen in g, contract regain percent ( see Note 2 ), and = applicable = width of the specimen in cm. order to avoid the risk of oil evaporation, the draught in the NOTE 1 -In drying oven shall not be continued throughout the drying period but shall be in operation only intermittently. regain value of the jute fabrics, should be as stipulated NOTE 2 -Contract in the relevant Indian Standard specifications for the material. determination of weight per linear yard or weight per square NOTE 3 -For yard to suit the needs of overseas consumers use the following formulae: a) Weight per g x 0.032 2 linear yard, in ounces = Weight in ounces = Weight per linear metre, in in b) Weight per square yard, g x 9.0205 per square metre, 5.1.3 Similarly determine the weight per linear metre metre of the remaining test specimens prepared as in 5.1.1. or square 5.1.4 Calculate the mean of all the values obtained as above and report it as the weight per linear metre or square metre of the jute fabric in the lot. 5.2 Procedure -BASED ON SQUARE CUT PIECES. 5.2.1 Lay one end of cloth from a cut or .roll, smoothly on the flat table and mark at least one 500 f 2 mm square specimen from a cut and three 500 f 2 mm square specimens from a roll with the help of a template taking different sets of warp and- weft threads as far as possible and cut out the specimens marked. Specimens should not be taken within 50 mm from a selvedge or 200 mm from an end of a cut or r6ll. 5.2.1.1 Prepare at least ten such speciinens from a sample lot. 5 IS : 2387 - 1969 5.2.1.2 Measure the width ofthe fabric according to IS : 195C1961*. 5.2.2 Dry the test specimen to constant weight in an oven maintained at 105" to 110°C and weigh it toan accuracy of O-2 percent of its weight without removing the specimen from the oven, the draught (!ee Note 1 under 5.1.2 ) being stopped during weighing. Calculate the weight per square metre or weight per linear metre at the applicable contract regain value (see Note 2 under 5.1.2 ) by the following formulae: Weight per square metre, in g = Weight where Wd(lOO+R) 25 Wd(lOO+R) per linear metre, in g = 2 500 x w Wd = oven-dry weight of the specimen in g, = Applicable contract regain percent ( see Note 2 under 5.1.2), and = Fabric width in cm. W NOTE-For determination of weight per linear yard or weight per square yard in ounces see Note 3 under 5.1.2. 5.2.3 Similarly determine the weight per square metre or weight per linear metre of the remaining test specimens prepared as in 5.2.1. 5.2.4 Calculate the mean of all the values obtained as above and report it as the weight per square metre or weight per linear metre of jxltc fabric in the lot. 6. METHOD B - BASED ON WEIGHING AND CORRECTING IT TO CONTRACT FULL CUT REGAIN OR ROLL R 6.1 Procedure 6.1.1 Determine the moisture regain of cloth in the cut or roll by the use of a suitable moisture meter. Take at least four readings on the cut and ten readings on the roll at random, along the length covering different portions across the width. NOTE - IJIRA ( Indian Jut.e Industries' Research Association, Calcutta ) Moisture Metert may be used for the purpose. This meter works on the principle of measuring the electrical resistance which changes with moisture content in the The specimen is placed between two poles of a specially designed material. spring loaded electrode. The small amount of current passing through the material held across the electrode poles is amplified and. recorded on the meter, calibrated against the actual moisture regain, based on oven dry method of the A separate chart, calibrating the readings of the actual moisture material. regain based on ovendry method of the material may also be used. The instrument shall be operated according to the manufacturer's instructions. - *Method for determination of dimensions of fabrics. f,\Iention of the name of the specific instrument is not intended to give preference to the use of that instrument over others not mentioned. promote or 6 IS : 2387 - 1969 6.1.2 Weigh the cut to the nearest 100 g and the roll at least to the nearest 500 g. Determine the weight of the packing material ( tare weight) of the roll to the nearest 100 g and calculate the net weight of cloth in the roll by deducting the tare weight from the gross weight. Determine the length and width of the fabric ( in the cut or roll ) according to IS : 1954-1961*. 6.1.3 From the moisture regain, weight and dimensions as determined in 6.1.1 and 6.1.2, calculate the weight in grams per linear metre or per square metre at the applicable contract regain ( see Note 2 under 5.1.2) using the following formulae: 1000 w 100 + R a) yeight per linear metre, in g = 7 x lOOt_M b) Weight where W = net weight of cloth in a cut or roll in kg, 1 = length of cloth in a cut or roll in m, applicable contract regain percent ( see Note 2 under 5.1.2 ), h!f = average moisture regain percent observed, and w = fabric width in cm. R= NOTE -For determination of weight per linear yard in ounces see Note 3 under 51.2. yard or weight per square per square &etre, in g = 10' w 100 + R Ixw x ioo + M 6.1.4 Similarly determine the weight per linear metre and weight per square metre of all the cuts or roils under test and calculate their average and report the averages. *Method for determination of dimensions of fabrics. 7 AMENDMENT NO. 2 TO OCTOBER 1959 IS : 2337 - 1969 METHODS FOR DETERMINATION OF WEIGHT OF JUTE FABRICS ! First Revision ) ( Super,vediq ( Clause 0.2, lines 3 and 4 ) - Amendment No. 1 ) ( Cover page, page 1 and page 3, title ) - Substitute `Mass' for `Weight'. Substitute `mass' for `weight'. Substitute `mass'for `weight'. ( Clause 1.1, lines I and 2 ) ( Clause 2.1, he 2 ) - Substitute `mass'for `weight'. Substitute `mass' for `weight'. `weight' and `105" f 3°C ( Clause 2.3, line 3 ) - Substitute `mass'for `weight'. ( Clause 2.4, heading and line 1 ) ( Clause 2.4, line 2 ) [ Clause 4.1( e ) ] -- Substitute for `105" to 110°C'. Substitute `105" & 3"C'for `105" to 110°C'. `mass' for ( Clause 5.1.1.2 ) - Substitute `mass'for `weight' and `IS 1954 : 1969*' for `IS : 1954 - 1961*`. ( Page 4, foot-note ) note: `*Methods fpr determination Substitute the following for the existing footrevision ).' of length and width of fabrics (first ( Clause 5.1.2, lines 1, 2 and 4 ) - Substitute `mass' for `weight'. 3"C'for `105" to 110°C'. for the existing the following ( Clause 5.1.2, line 2 ) - Substitute `105' f Substitute ( Clause 5.1.2, formulae ) formulae: `Mass per linear metre, in g = A4d ( `E + R ) Mass per square metre, in g = where Md = oven-dry mass of the specimen in g, R = applicable contract regain percent ( see Note 2 ), and w = width of the specimen in cm.' 1 2Md(lOO+R) 10 ( Clause 5.1.2, Note 3 ) - Substitute Note: `For determination the needs of overseas a) Mass per linear h) Mass per square ( the following for the yard existing to suit of mass per linear yard or mass per square consumers, use the following formulae: yard, in ounces yard, in ounces = Mass per linear = Mass per square metre, metre, in g x 0 032 2 in g x 0 029 5' Ckzuse 5.1.3, line 1 ) - Substitute `mass' for `weight'. `weight'. ( Clause 5.1.4, line 2 ) - Substitute `mass'for ( Clause 5.2.1, line 5 ) ( Clause 5.2.1.2, he 1961*`. Substitute `taken' for `teken'. Substitute `IS 1954 : 1969*' for `IS : 1954Substitute `mass'for `weight'. 1) - (Clause 5.2.2, lines 1, 2, 4 and 5 ) ( Clause 5.2.2, line 2 ) - Substitute `105" f 3OC'for `105" to 110°C'. Substitute the following for the existing ( Clause 5.2.2, formulae 1 formulae: `Mass per square metre, in g = Md(lOO+ip) 25 Md( 100 + R)Y w Mass per linear metre, in g = where 2500 Md = oven-dry mass of the specimen, in g; R = applicable contract 5.1.2 ); and w = fabric width in cm.' regain percent ( see Note 2 under ( Clause 5.2.2, Note ) - Substitute `mass'for `weight'. ( Cluuse 5.2.3, line 1 ) - Substitute `mass' fir Substitute `ma&fir 2 `weight'. `weight'. ( Clause 5.2.4, line 2 ) - ( Clause 6.1.1, Note ) - Substitute the following for the existing Note : `NOTE - JJIRA ( Indian Jute Industries' Research Association ) moisture This meter works on the principle of meter may be used for the purpose. measuring the electrical resistance which changes with moisture content in the material. The specimen (jute product ) is placed under the electrode gun having two poles of specially designed spring-loaded electrodes. The small amount of current passing through the electrodes is amplified and recorded on the meter calibrated against the actual moisture regain based on oven-dry method, of the material. A separate chart calibrating the actual moisture regain based on oven-dry method, of the material may also be used. The instrument shall be operated according to the manufacturer's instructions.' ( Page 6, foot-note marked with `*' mark ) for the existing foot-note: `*Methods ( Clause for determination of length and width Substitute Substitute of fabrics the (firsr following revision ).' 6.1.2, lines 2, 3 and 4 ) - `mass'for `weight'. ( Clause 6.1.2, line 6 ) 1961*`. Substitute `IS 1954 : 1969*' for `IS : 1954 - ( Clause 6.1.3. lines 1 and 2 ) ( Clause 6.1.3, formulae ) formulae: Substitute `mass'for `weight'. the following for the existing Substitute 1 000 M x JO0 + Rc I 100 + Ro loo -I- Rc 105 M b) Mass per square metre, in g = IXW X100 + Ro where M = net mass of cloth in a cut or roll in kg, `a) Mass per linear metre, in g = I = length of cloth in a cut or roll in m, Ro = applicable contract regain percent ( see Note 2 under 5.1.2 ), Ro = average moisture regain percent observed, and w = fabric width in cm.' ( Clause 6.1.3, Note ) - Substitute `mass' for `weight'. ( Clause 6.1.4, line 1 ) - Substitute the word `mass'for `weight'. ( Page 7, foot-note ) foot-note: `*Methods for determination Substitute the following for (first the existing of length and width of fabrics revision .' ) (TDCl) 3 Printed at Ptintwell Printers, Delhi, India